First of all, I said "global navigation", not "global animation"... Global navigation is simply the nav bar you use for the whole site.
One option you have would be not using frames and simply add the navigation drop down on every page of your website. You could create a template with you nav bar and logo and use that for each page. Many sites do this such as MSN, Yahoo, Amazon, etc. They, of course, use server end programs to access data that is stored in a data base and then converted into HTML so someone wouldn't have to go in and hard code each and every page. If your website is small you should be fine adding the drop down to each page using a global template.